Motion converter



g- 8, 1950 I. F. WILLIAMS 2,517,818

MOTION CONVERTER Filed May 3; 1947 I 2 Sheets-Sheet l INVENTOR. JIM e1! l't'Wf/fi'amd.

$0M (54mm ATTORNEY Aug. 8, 1950 I. F. WILLIAMS MOTION CONVERTER 2 Sheets-Sheet 2 Filed May 3, 1947 INVENTOR. [rue/4 EWl/fid/WJ.

k imm ATTORNEY Patented Aug. 8, 1950 H r 2,517,318 I MOTION CONVERT-E3 'Irven F. Williams, Midland, Mich.-

,This invention relates to "file .attachmentsffor milling machines, and more. particularly to an attachment for filing dieopen'ings," punches, etc. to precisionaccuracy'."

One o f the 'prim'e'objcts of jtheinven'tion'i's to design [a file. 'att'achment whichfca'n be attached to andlop'erated'by a "mining machine forfilin' straight lands on dies and punches, or filing square 'cornersin 'or on' workwitliout danger of over-cutting the corners.

Another object is to provide a filing attachment applicable to a conventional milling machine, and

by means of which a predetermined, accurate radius can be filed by clamping the work on a turntable, with the radius point in the center of said table, and then engaging the file to the work so that the filing operation is accomplished by the same operation as required to operate on conventional mill work.

Another object is to provide a filing attachment from which the file may be removed, and hones substituted for finishing the work.

Another object is to provide a file attachment in which the work can be fed from any direction and the feed regulated to provide smooth, even operation, and smooth, accurate and even finish.

A further object still is to provide a file attachment in which the file can be completely used, the worn sections of the file being broken off, and the remaining unused file section adjusted accordingly, so that the entire length of the file can be used, thus eliminating any waste of the file.

Still a further object is to provide means for imparting a reciprocating motion to the file, and provide means for the easy and quick adjustment thereof n ama ia 1947 Seems 5 11,; I

1'Claim. (o1." -74- 5 3 Fig; 5 is anenlarged, detail view showing the spindle with the cam groove therein.

Fig. 6 is a fragmentary, side-elevational view of the actuating lever.

Refer now to thedrawings in which I have shownthe preferred embodiment of my invention; 'The numeral 8' indicates the quill of the milling machine (not shown) in which the spindle '9 is mounted and secured in the usual manner, the lower end of said spindle being formed with an enlarged hub section H! in which a cam groove II is provided.

The file attachment bracket comprises a body member I 2 shaped as clearly shown in Figs. 1 and 2 of the drawings, the one end l3 being tubular in shape, and is split as at H, laterally projecting wings l5 being formed integral with the split ends, and a bolt l6 extends through said wings for rigidly clamping them in set position on the quill of the milling machine.

The outer end of the bracket body I2 is offset as at IT, and vertically disposed dovetails 18 are With the above and other objects in view, the

present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawings, and more particularly pointed out in the appended claim, it being understood that changes may be made in the form, size, proportion, and minor details of construction, without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawings:

Fig. 1 is a fragmentary, front-elevational view showing the file attachment secured to the spindle of a milling machine.

Fig. 2 is a top plan view thereof.

Fig. 3 is an enlarged, fragmentary, front-elevational view showing the file and securing means.

Fig. 4 is a sectional, plan view thereof.

formed as shown and form a slide s in which a file holder I9 is mounted, a slotted opening 20 being provided in the offset section and for a purpose to be presently described.

The file holder I9 is mounted for reciprocal movement in said slide, the edges being angled as at '-2l to slidably engagethe dovetails l8, and a gib 22 is mounted in facial contact with one of the dovetails, said gib being held in position by means of setscrews 23 or the like.

A cover plate 24 is secured to the face of the holder H) by means of screws 25, and a plurality of setscrews 2B are mounted in said cover and serve to secure the file F which is mounted in the holder, similar longitudinally disposed screws 21 being provided in theme edge of the holder as shown, to secure the file against lateral movement, these screws 26 and 21 serving to hold the file rigidly in position.

The holder I9 is mounted for reciprocatory movement on the bracket, and is actuated by means of a lever 28 having a cam roller 29 journaled on a pin 30 provided in theone end of the lever, this lever being pivotally mounted on the bracket H by means of the setscrew 3!, and another setscrew 32 extends through a slotted opening 33 provided in the end of the lever 28, said screw extending through the opening 2!] in the back of the ofiset section I! and being threaded into the file holder l9, and it will therefore be obvious that as the spindle 9 is rotated, the cam roller 29 will follow the cam path ll, rock the lever 28 on the bolt 3!, and impart a 3 reciprocating motion to the holder [9 in which the file is mounted.

The stroke is governed by the cam groove or path, and when the projecting work-engaging end of the file becomes worn, it is broken off and the screws 26 and 21 are then manipulated to permit lowering of a new unused section of the file into the work-engaging zone, and the file can be easily removed from the work by merely raising the quill of the mill or by lowering the table (not shown).

I wish to direct particular attention to the fact that the holder forms a relatively long bearing so that there is no file bending or deflection, as it engages the work, thus insuring accurate precision finish.

From the foregoing description, it will be obvione that I have perfected a very simple, practical;

4 mounted in said slide, a horizontally disposed lever mounted on said bracket at a point intermediate its length, a horizontally extending, slotted opening in the outer end of the lever, a vertically extending, slotted opening in said bracket, a bolt mounted in the slide and projecting through said slotted openings in the lever and bracket respectively, and a roller mounted on the'opposite end of the lever and engaging insaid cam groove for imparting reciprocating, vertical movement to said holder when the spindle is rotated.

IRVEN F. WILLIAMS.

I REFERENCES CITED The following references are of record in the file of this pa'tentf "UNITED STATES PATENTS 

